HKPro.com has a pic and description of the prototype HK P46 4.6x30mm "Ultimate Combat Pistol" (UCP). The P46 is apparently a follow-on to the HK MP7A1 PDW (Personal Defense Weapon), which is Heckler & Koch’s original weapon chambered for the 4.6x30mm cartridge. The following comes directly from the HKPRO.com HK P46 (4.6x30mm) Ultimate Combat Pistol page:

"Newest on the HK handgun scene appears to be the HK UCP or Ultimate Combat Pistol. According to the excellent Jane’s Infantry Weapons, this handgun design commenced in 2002 as a follow on to the MP7 project, completing the HK Close Range Weapon System. HK requested that the…

German Army Matériel Command type classify this pistol, and thus the designation P46.
According to this document, obtained by HKPRO.COM, there is also a subcompact version under development.

The P46 is a self-loading pistol with a delayed blowback system, is fully ambidextrous, to include magazine, and slide release and features a MIL-STD-1913 (Picatinny) interface on the frame for mounting all the usual accoutrements.

Interestingly, the P46 "is fitted with a modular trigger system which allows a change of trigger/hammer configurations and trigger weights." Use with Brügger and Thomet suppressor is planned, and a longer threaded barrel and higher profile sights will be extant."

Developing…

It should be noted that HKPRO.com is the single best resource on the web for all things Heckler & Koch-related. They tend to get the scoop on new Heckler & Koch products (including prototypes) before anyone else. It’s therefore a fantastic resource for HK enthusiasts.

About David Crane

David Crane started publishing online in 2001. Since that time, governments, military organizations, Special Operators (i.e. professional trigger pullers), agencies, and civilian tactical shooters the world over have come to depend on Defense Review as the authoritative source of news and information on "the latest and greatest" in the field of military defense and tactical technology and hardware, including tactical firearms, ammunition, equipment, gear, and training.